Document And Entity Information	3 Months Ended
	Mar. 31, 2015
Document Information [Line Items]
Entity Registrant Name	Capstone Therapeutics Corp.
Entity Central Index Key	0000887151
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	CAPS
Entity Common Stock, Shares Outstanding	0
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2015
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2015